Amazon.com: Facmogu ST-838 2.1CH Subwoofer Amplifier Audio Stereo Bass Amp, RMS 20Wx2+40W Class D Amplifier with Subwoofer Output, 80W Mini Sub Bass Amp Digital Power Amplifier with Power Supply - Black :
Car Amplifier Board 12v High Power Subwoofer Amplifier 120w Full Tone Pure Bass Car Subwoofer Core 8-12 Inch - Headphone Amplifier - AliExpress
KASA500 Subwoofer Amplifier | KEF USA
AudioControl 800W Monoblock Class D Amplifier Black LC-1.800 - Best Buy
Monoprice SWA-200 200-watt Subwoofer Amp with Crossover and Phase Control - Monoprice.com
For Subwoofer 500w Hifi Super Bass Digital Subwoofer Amplifier Class D - Buy Amplifier Plate,Plate Amplifier,Subwoofer Amplifier Product on Alibaba.com
500W Class D Mono Subwoofer Amplifier, Crossover Control and Auto Sensing - Contemporary - Home Electronics - by OSD Audio | Houzz